Keystones — Lintel
Five GCSE retrieval questions · 20 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.069 in standard form
Answer: 6.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 18.84cm -
4. Ratio Mixed ratio problems
Simplify: 15:9:6
Answer: 5:3:2 -
5. Statistics Mean
Calculate the mean of: 46, 30, 30, 32, 16, 30. Give your answer to 2 decimal places
Answer: 30.67